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[xsl] Question regarding namespaces

2008-04-07 21:13:24
I have a stylesheet which I use to normalize various versions of a DTD. Some old XML documents created against this DTD do not include a default namespace declaration on the root element but the newer ones do, and I think the way I have to handle this is to have two templates in my stylesheet, one of which selects root elements without a namespace and one which does:

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
    xmlns:mynamespace="namespaceURI"
    version="2.0">

<xsl:template match="rootElement">
<!-- do stuff when no namespace declaration present: older documents -->
</xsl:template>

<xsl:template match="mynamespace:rootElement">
<!-- do stuff when there is a namespace declaration present: newer documents -->
</xsl:template>

...

</xsl:stylesheet>

Documents which have a namespace declaration specify it as <rootElement xmlns="namespaceURI">.

I'm noticing that the stylesheet works fine when run under a debugger such as Oxygen. However, when I compile this stylesheet under Saxon- B 9-0-0-4j and run it as the first filter of a JAXP filter chain, the template with the namespace prefix gets invoked regardless of whether the XML document specifies a namespace on its root element or not. I put in some <xsl:message> statements to dump the in-scope namespaces, and the only one I see is the XML namespace - no reference to "namespaceURI". Any thoughts on what's going on here, or where my logic is faulty?



Thanks
Chris


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